fix(ci): add jq to system dependencies and remove stale submodule entries

- Add jq to apt-get install for deployment verification step
- Remove orphaned submodule entries (exa-mcp-server-source, mcp-wikidata) from git index
- Rename 'Install rsync' step to 'Install system dependencies'

.forgejo/workflows/deploy-frontend.yml

@@ -61,8 +61,8 @@ jobs:
         working-directory: frontend
         run: pnpm install --frozen-lockfile
 
-      - name: Install rsync
-        run: apt-get update && apt-get install -y rsync
+      - name: Install system dependencies
+        run: apt-get update && apt-get install -y rsync jq
 
       - name: Sync LinkML schemas to frontend
         working-directory: frontend

exa-mcp-server-source

@@ -1 +0,0 @@
-Subproject commit 4aeb0543f9becb95a320dd60c547b86f7134cbe3

mcp-wikidata

@@ -1 +0,0 @@
-Subproject commit 230e0456d25831935c0fa4dfe699c900afd3b6bc